A group of House Democrats released a letter Monday vowing to vote against Nancy Pelosi in the race for House speaker -- the first major, public warning shot from detractors of the California Democrat as they try to kneecap the longtime leader's bid for speaker and their most aggressive move yet.

Stoking fear about a migrant caravan was a top pre-election talking point of President Donald Trump's, but most Americans think migrants who reach the US border should be given the opportunity to enter the country if they meet certain requirements, according to a new poll by Monmouth University.